void matrix_rotate_z(float *m, float rad)
{
float mr[4*4], mt[4*4];
matrix_set_z_rotation(mr, rad);
matrix_mult4x4(mr, m, mt);
matrix_copy(m, mt);
}
void sf2d_draw_texture_rotate_cut_scale(const sf2d_texture *texture, int x, int y, float rad, int tex_x, int tex_y, int tex_w, int tex_h, float x_scale, float y_scale)
{
sf2d_vertex_pos_tex *vertices = sf2d_pool_malloc(4 * sizeof(sf2d_vertex_pos_tex));
//Don't even try to understand what I'm doing here (because I don't even understand it).
//Matrices are boring.
int w2 = (texture->width * x_scale)/2.0f;
int h2 = (texture->height * y_scale)/2.0f;
vertices[0].position = (sf2d_vector_3f){(float)-w2, (float)-h2, 0.5f};
vertices[1].position = (sf2d_vector_3f){(float) w2, (float)-h2, 0.5f};
vertices[2].position = (sf2d_vector_3f){(float)-w2, (float) h2, 0.5f};
vertices[3].position = (sf2d_vector_3f){(float) w2, (float) h2, 0.5f};
float u0 = tex_x/(float)texture->pow2_w;
float v0 = tex_y/(float)texture->pow2_h;
float u1 = (tex_x+tex_w)/(float)texture->pow2_w;
float v1 = (tex_y+tex_h)/(float)texture->pow2_h;
vertices[0].texcoord = (sf2d_vector_2f){u0, v0};
vertices[1].texcoord = (sf2d_vector_2f){u1, v0};
vertices[2].texcoord = (sf2d_vector_2f){u0, v1};
vertices[3].texcoord = (sf2d_vector_2f){u1, v1};
float m[4*4];
matrix_set_z_rotation(m, rad);
sf2d_vector_3f rot[4];
int i;
for (i = 0; i < 4; i++) {
vector_mult_matrix4x4(m, &vertices[i].position, &rot[i]);
}
vertices[0].position = (sf2d_vector_3f){rot[0].x + x + w2, rot[0].y + y + h2, rot[0].z};
vertices[1].position = (sf2d_vector_3f){rot[1].x + x * x_scale + w2, rot[1].y + y + h2, rot[1].z};
vertices[2].position = (sf2d_vector_3f){rot[2].x + x + w2, rot[2].y + y * y_scale + h2, rot[2].z};
vertices[3].position = (sf2d_vector_3f){rot[3].x + x * x_scale + w2, rot[3].y + y * y_scale + h2, rot[3].z};
sf2d_bind_texture(texture, GPU_TEXUNIT0);
GPU_SetAttributeBuffers(
2, // number of attributes
(u32*)osConvertVirtToPhys((u32)vertices),
GPU_ATTRIBFMT(0, 3, GPU_FLOAT) | GPU_ATTRIBFMT(1, 2, GPU_FLOAT),
0xFFFC, //0b1100
0x10,
1, //number of buffers
(u32[]){0x0}, // buffer offsets (placeholders)
(u64[]){0x10}, // attribute permutations for each buffer
(u8[]){2} // number of attributes for each buffer
);
GPU_DrawArray(GPU_TRIANGLE_STRIP, 4);
}
void sf2d_draw_texture_rotate(const sf2d_texture *texture, int x, int y, float rad)
{
sf2d_vertex_pos_tex *vertices = sf2d_pool_malloc(4 * sizeof(sf2d_vertex_pos_tex));
int w2 = texture->width/2.0f;
int h2 = texture->height/2.0f;
vertices[0].position = (sf2d_vector_3f){(float)-w2, (float)-h2, 0.5f};
vertices[1].position = (sf2d_vector_3f){(float) w2, (float)-h2, 0.5f};
vertices[2].position = (sf2d_vector_3f){(float)-w2, (float) h2, 0.5f};
vertices[3].position = (sf2d_vector_3f){(float) w2, (float) h2, 0.5f};
float u = texture->width/(float)texture->pow2_w;
float v = texture->height/(float)texture->pow2_h;
vertices[0].texcoord = (sf2d_vector_2f){0.0f, 0.0f};
vertices[1].texcoord = (sf2d_vector_2f){u, 0.0f};
vertices[2].texcoord = (sf2d_vector_2f){0.0f, v};
vertices[3].texcoord = (sf2d_vector_2f){u, v};
float m[4*4];
matrix_set_z_rotation(m, rad);
sf2d_vector_3f rot[4];
int i;
for (i = 0; i < 4; i++) {
vector_mult_matrix4x4(m, &vertices[i].position, &rot[i]);
}
for (i = 0; i < 4; i++) {
vertices[i].position = (sf2d_vector_3f){rot[i].x + x + w2, rot[i].y + y + h2, rot[i].z};
}
sf2d_bind_texture(texture, GPU_TEXUNIT0);
GPU_SetAttributeBuffers(
2, // number of attributes
(u32*)osConvertVirtToPhys((u32)vertices),
GPU_ATTRIBFMT(0, 3, GPU_FLOAT) | GPU_ATTRIBFMT(1, 2, GPU_FLOAT),
0xFFFC, //0b1100
0x10,
1, //number of buffers
(u32[]){0x0}, // buffer offsets (placeholders)
(u64[]){0x10}, // attribute permutations for each buffer
(u8[]){2} // number of attributes for each buffer
);
GPU_DrawArray(GPU_TRIANGLE_STRIP, 4);
}
